What are the characteristics of stationary waves?
Answers
Characteristics of stationary waves. The points where displacement is zero are called nodes and the points where the displacement is maximum are called antinodes. Pressure changes are maximum at nodes and minimum at antinodes. All the particles except those at the nodes, execute simple harmonic motions of same period.
stationary waves, there are certain points called nodes where the particles are permanently at rest and certain other points called antinodes where the particles vibrate with maximum amplitude. The nodes and antinodes are formed alternately.
All the particles of the medium except those at the nodes, vibrate simple harmonically with a time period equal to that of the component waves.
The amplitude of vibration increases gradually from zero to maximum from a node to an antinode.
The medium is split up into segments. The particles in a segment vibrate in phase. The particles in one segment are out of phase with the particles in the neighbouring segment by 180o.
Velocity and acceleration of all the particles separated by a distance l, are the same at a given instant.
In a given segment, the particles attain their maximum or minimum velocity and acceleration at the same instant.
There is no net transport of energy in the medium.
Compressions and rarefactions do not travel forward as in progressive waves. They appear and disappear alternately, at the same place.
During each vibration, all the particles pass simultaneously through their mean positions twice, with maximum velocity which is different for different particles.
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